Photographic-printing apparatus.



W. B. GONAWAY & C. L. STEVENS.

PHOTOGRAPHIG PRINTING APPARATUS.

APPLICATION FILED JULY 29,1908.

Patented Apr. 20, 1909.

anvan foal photogra hic WILLIAM B. (lONAWAY AND CARROLL L. STEVENS,OFAURORA, INDIANA.

Specification of Letters Patent.

rnorosnarmo-rnmrme APPARATUS.

Patented April so, 1909.

Application filed. July 29, 1908. Serial No. 445,912.

To all whom it may concern: Be it known that we, WrLLIAM B. 'CONA- WAYand CARROLL L. STEVENS, citizens of the United States ofAmerica, andresidents of Aurora, county of Dea'rborn and State of Indiana, haveinvented certain new and useful Improvements in Photographic-PrintingApparatus, of which the following is a specification. 1'

Our invention relates to improvements in rinting apparatus. One 0 itsdbjects is to provide a convenient means for printingphotographs'byartificial light, to secure uniform prints, and to,

avoid waste of material.

Another object is to provide an improved prrfingement and means forregulating the i t. Another obi'ect is to provide improved means to reguate and vary the time of exposure of the prints, and register the numerof rints made.

Anot er object is to provide improved means to turn on and off the lightand stop the registering a paratus after the .prints have received sucient exposure, or when the ap aratus is not in use.

It rther consists in certain details of form, combination andarrangement, all of which will be, more fully set forthin thedescription of the accompanying drawings, in which Figure 1 is a frontelevation of our improved apparatus' Fig. 2 is a section on line 11-?)of ig. 1. Fig.3 is a diagram of the electrical switches and wiringconnecting the lights and motor and switches in circuit. Fig. 4 issectional detail view of the friction-clutc Fig. 5 is an enlarged detailof the register, indicating the number of prints produced. Fi 6 is aside elevation .of a modification o the transmitting mechanism.

In the accompanying drawings, A, represents a frame or cabinet, withinwhich is contained the apparatus and mechanism. In the front of thecabinet we provide one or T110138 openings, or windows, A, to receivethe ordlnaryphotographic rinting frames, which are seated therein acinginwardly, and may be held inplace by spring latches, a. We alsopreferably rovide springs, a,

d ge of the printing ment is also made to receive and retain plates ofground glass, a, in front of the printing frames, which plates, a may beremoved and replaced as required. The ground glass serves to diffuse thelight evenly over the prints. The artificial light is obtained from aseries of incandescent electric lights, B, the rear or base portion ofthe globes of said lights being silvered or mirrored to reflect thelight toward the. rinting frames. The number of lights used will dependupon the size of the prints it is desired to produce.

The respective lights are separated from each other by partitions, b, ofapproximately the same depth as the length of the light globes, so thatthe light from each globe is irected toward that portion of the printingframe directly in front of the globe, and preventedfrom striking uponother parts of the printing frame at undesirable angles.

Each incandescent light has a separate circu1 t, which is controlled byone of the switches, C, by means of which switches,

C, and desired number of said lightsinaybe cut into or out of circuit,the combination of lights being arranged to correspond with therequirements of the particular negative in use, and varied, if required,with each change of negative.

C represents the main switch between the line and the lights and motorin the cabinet A. The bench, or table, A of cabinet, A, is provided witha anel of rub or orange glass, at, which is iluminated mm the undersideby an incandescent light, a, so that by placing the printing frame overthe panel, a, the operator is enabled to arrange a fresh sheet ofsensitized paper in proper position over the negative and to close theprinting frame thereonf If desired, a panel of white glass may be usedanda globe of colored glass over the electric light.

Ve operate the mechanism controlling the lights, and timing andregistering the prints, preferably by means of a small electric motor Dof shunt type. Motors of the shunt type will run at substantially auniform number of revolutions per minute, and by means of a train ofgears 03, d, d d d 03, cl, (Z commencin with gear, at, on the motorshaft and terminatin in gear, (1, loosely mounted on the shaft, E thespeed of gear, d, is reduced to one revolution per minute. The shafts,(Z carrying the respective ears, (1, to (Z are journaled in brackets,attached to the inside of cabinet, A. The shaft E, has splined thereto adisk, e, which is held in frictional engagement with gear, 61, by

means of a spring, e, pressing at its opposite end upon a collar lockedto the shaft, E. A crank arm or lever, F, is rigidly attached to the endof shaft, E, outside the cabinet, A, the free end of the lever, F, beingadapted to travel over a dial, f, divided to indicate frac-- tions of aminute.

G, represents a rock shaft journaled at the zero point on dial, f, andprovided outside the cabinet with acrank arm, g, and pin, g,

which, pin is adapted to be engaged by the lever,'l*, to rock 'shaft, G,in one direction, while a spring 9 tends to rotate shaft, G, in

- the. opposite direction. Inside the cabinet,

A, theshaft, Gr, carries an electrical switch A serves to register thenumber of prints which have been taken from the respective negatives.The pointer, 2, is actuated by means of a ratchet wheel, J, within thecabinet, and fixed to the stem of pointer, 2', which ratchet wheel ismoved forward one space at each movement of rock shaft, G, by means of apawl, J, carried by rock shaft, G, the

wheel J being prevented from moving backward by a pawl J In operation,the cabinet, A, being located in a dark room, or room having a subdued,or ruby light, the switches, C, are adjusted to close the circuits ofsuch lights, B, as may be required by the character of the particularnegative to be treated. The sensitized paper is placed with thenegative, in the printing frame, while the printing frame rests overpanel, a The rinting frame is then secured in the opening, A. Theoperator then grasps lever, 1 and moves it to the left, over dial J", tothe point on the dial indicating the esired length of exposure to begiven the rint, causing disk, 6, to slip on gear, 01 i s soon as lever,F, is moved, the spring, 9 rocks shaft, G, causing switch lever, H, toclose the circuit through the lights, B, at the contacts, it, h. Themovements of themotor, D, through gears, 01, to d, and friction, e,slowly return the lever, F, to the normal position from which is wasmoved by the operator, When lever, F,-contacts with pin, 9, shaft, G, isrocked, thereby, in the opposite direction, breaking the circuit throughthe lights, B whereupon the printing frame is detached, and a freshsheet of sensitized paper introduced. When a suflicient number of printsfrom one negative have been obtained, the operator turns pointer, z', byhand, to the zero position.

W e prerera bl y provide a plurality of Wmdows, A, and duplicate setsofrnechanism to control the lights thereof, said rilup'licate' 'vmechanisms being geared to and pperated in common by motor, D, while theslip of. disks,

6, permit both train of gears to run with the motor.

\Ve provide a central partitioma, in the upright portion of cabinet, A.We also prefer to hinge the sections throu h which windows, A, arepierced, so as to orm doors, a", a which permits said doors to be openedto give access to the lights and to adjust the panels, a

l In'the modification, F ig.- 6, the shaft of motor, J carries worms,in, is, at opposite ends. Sa1d worms mesh with worm wheels,

leak on shaft, E, which worm wheels correspond to gears, d, of Figs. 1and2, and are of such ratio relativeto the worms, as to make onerev'olution per'minute. Motion is transmitted from the wormwheels to theshafts, E, through friction clutches, as illustrated in Fig.1.

The mechanism herein illustrated and described is capable ofconsiderable modifica-v cure separate spheres of illumination and.

adapted when all in use to illuminate the face of a negative in theprinting frame un1- formly over its whole surface.

2. in a mechanism of the character indi-.

cated, a cabinet having an opening to. receive a printing frame, aseries of independent lights each having a shade to intercept a portionof its rays to secure separate and overlapping spheres of illuminationand adapted when all in use to illuminate the face of a negative in theprinting frame uniformly over its whole surface, and means to separatelycontrol said lights so as to vary the intensity of illumination ondifierent areas of the negative face! 3. In a mechanism of the characterindicated, a cabinet having an openingto receive a printing frame, aseries of independent lights to illuminate difierent sections of a neative carried by said printing frame, said ights being arranged inseparate coinpartments-and having separate and overlapping spheres ofillumination, and means to separately control said lights so as to varythe intensity of illumination on different areas of the face of anegative in the printing frame.

4. In a mechanism of the character indicated, a support to receive aprinting frame, a series of lights arranged in front of said rintingframe, said lights having shades to intercept portien of rays of eachlight throu hsaid lightsl i I '7. na mechanism of-the character indi-'to create independent and overlapping spheres of illumination, and meansto sep arately control said lights to vary the intensity of illuminationon dillerent areas of theface of saidprintin frame- 5. In a mechanism 0the character indicated, a support to receive a printing frame, a seriesof electric lights arranged -in front of said printing frame, saidlights having shades to intercept a portion ofthe rays of each light tovcreate independent and overlapping spheres of illumination andindependently controlled circuits and mechanism actuated by the operatorto establish a circuit through the lights,- and to automatically opencircuits through the" lights after the lapse of a predetermined periodof time.

6. Ina mechanism of the character indicated,,a printing frame support, aseries of. independent electric lights arranged in front of a printingframe, carried by said support, said lights being arranged in parallelcircuit and having independent controlling switches,

'a switch common to the circuit of all the lights adapted to be closedby the operator- 'and to be automatically opened after the lapse of apredetermined len h of time, and mechanism moving at a su stantiallyuniform rate of speed to automatically open said common switch to breakthe circuit cated in combination with a printing frame switclies, anelectric motor, a

van electrical switch common to the circuits of all of said electriclights.

8. In a mechanism of the character indicated a printing frame support,an electric light arranged to illuminate a printing frame carried bysaid support, an'electric motor, a clutch comprising a positively drivenmember receivin motion from said motor, anda member a apted to slideupon said positively driven member, a

said sliding clutch member, a pointer on said shaft, a dial over whichsaid'pointer isadapted tojtravel, a rock vshaft adapted to be rocked bythe motion of said pointer, an electrical switch controllingthe circuitof said electric light actuated by said rock ointer shaft adapted to beintermittently driven by shaft, and a pointer actuated 'by the movementsof said rock shaft and ada ted to indicate the number of prints pr need,

9.. In a mechanism'of the character indicated, a cabinet comprising anupright section having a series of electric lights arranged in separatecom artments, to have overlapping spheres of i lumination, a door infront of said lights, a ground glass detacha-bly carried by said door,an opening in said door infront of said panel to receive "a printingframe.

1O. In a mechanism" of the character indicated a cabinet comprising anupright section having a series of electric lights arran ed in avertical plane and each provided with a shade to intercept a portion ofthe rays and create separate and overlapping spheres of illumination, avertical door 1n front of said lights, a ground glass panel detachablycarried by said door, an opening in V i said door in front of said panelto receive a printing frame, a table section having a transparent panel,and means for illumi-v nating the compartment beneath said table. I Intestimony whereof, We have hereunto afixed our signatures, in thepresence of two itnesses.

' WlLLlEAli l B. CONAW'AY.

CARROLL L. STEVENS. Witnesses:

Acorns :MCCORMACK, (3. .VI', lldrnns.

